Mass, energy, gravity, space, time and math

[Dremmer]

Can we perceive these things directly? I'd say we can't. We can only perceive them indirectly. We have no senses to directly perceive these things.

 

[ZapperZ]

Provide an example of something that you consider to be perceived "directly".

Zz.

 

[arildno]

Dremmer:
We have no senses that perceive anything "directly", so frankly, I don't see your point.

 

[Kholdstare]

We do not even know in full detail what goes on when we "perceive".

 

[Dremmer]

Provide an example of something that you consider to be perceived "directly".

Zz.

Color. We can directly perceive an object's color, but not its mass.

 

[ZapperZ]

Color. We can directly perceive an object's color, but not its mass.

How is this "direct"?

"Color" is some frequency in the electromagnetic spectrum. So one actually detects the frequency via some means, either using a resonant circuit/system, or in the case of visible light, via your eyes, which convert it to electrical impulses in your optical system.

So why is this more direct than detecting mass of an object?

Zz.

 

[arildno]

dremmer:
Somewhat more interesting questions would have been, for example:
1. Have we reason to believe that phenomena not appreciable by our sensory apparatus can as reliably be measured as those phenomene we may also perveive with our sensory apparatus?

2. Why have we not developed a sensory apparatus that measures the mass of objects, or differences in the various local gravity fields?